Monkey-wrench.



J. MASON.

MONKEY WRENCH.

APPLICATION FILED APR.13,1908.

Patented May 18, 1909.

F L g. 2.

Fig.4.

WITNESSES.

GAME S MAS ON.

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A TTORNE Y UNITED STATES B TEN T OFFICE.

JAMES MASON, OF SAN DIEGO, CALIFORNIA.

MONKEY-WRENCH.

To all whom 'it may concern:

Be it known'that I, J AMES Mason, a citizen of the United States, residing at San Diego, in the county of San Diego, State of California, have invented a new and useful Improvement in Monkeyrenches, of which the following is a specification.

My invention relates to an improvement in monkey wrenches and has for its object the provision of a device of this character comprising a grooved shank having a fixed jaw at one end thereof and a rotative and longitudinally movable handle at the opposite end thereof. This handle has an open ing formed of sufficient size to receive the end of the shank and said handle is fixed to a rod which is threaded into a portion of the shank and which actuates a wedge. Said wedge works back and forth in a groove in the shank for the purpose of tightening the movable aw of said wrench, the movable jaw is intended to slip back and forth freely 011 the shank when the wedge is released from pressure.

The object of my invention is to produce an economically constructed wrench, which is made from solid metal, and can'be constructed with greater accuracy and produce better results than the ordinary wrenches now in use.

In carrying out my invention I do not wish to be understood that it is confined to the details shown by the accompanying drawings. The inventive idea is broader than the particular embodiment herein presented and described, and includes in const-ruction and mechanism that which comes within the scope of the claim.

I attain these objects by the mechanism illustrated in the accompanying drawings in which Figure 1 is a side and sectional view of a monkey wrench, showing the complete method of construction and operation of the same. Fig. 2 is a top view of a wrench com plete, showing the adjustable form of the wedge. Fig. 3 is an end view of the wrench cut in two on lines 3-4. Fig. 4 is an end Specification of Letters Patent.

Application filed April 13, 1908.

Patented May 18, 1909.

Serial No. 426,874.

view of the wrench, cut in two on line 1-2. Fig. 5 is a view of the wedge detached from the wrench, showing the complete formation of the wedge.

Similar letters refer to similar throughout the several views.

A. is the shank which contains the groove, in which the wedge C is operated by means of a groove G- in one end that receives the collar F on red D. Rod D being provided with threads E that are intended to work in a threaded opening in the lower end of shank A, to which the handle H is attached, handle H being provided with an opening to receive the shank A, shank A having a hole at the lower end for the purpose of receiving the rod D which is made fast to the lower end of handle H by a collar I at one end and. a screw I at the other end, said screw entering the rod D. Said rod being made fast to handle H for the purpose of forcing the rod to turn in shank A to operate the threaded portion of the rod which adjusts the wedge C, causing it to tighten the movable aw B of the wrench and prevent it from moving when strain is brought upon it by means of turning a nut or bolt or otherwise operated for any and all purposes for which a wrench is intended.

Having thus fully described my invention, I claim:

A wrench comprising a grooved shank having a fixed aw at one end thereof, a handle mounted for rotary and longitudinal movement upon the opposite end of said shank, a rod mounted to turn with said. handle and having a threaded portion which enters a threaded portion of said shank, the free end of said rod projecting into the groove of said shank, a wedge with which the free end of said rod has engagement and a loose jaw having an opening therethrough, said jaw exten'ding around the shank and said wedge as and for the purposes set forth.

JAMES h'IASON.

parts W i tnesses J. MASTER, RUnoLF HASELBAUER. 

